Frederick egge



F. EGGrE.- Piano Lock.

No. 280,866. Patented Aug.10,188o.

Ma Y ,y

@Y ATTORNEY N-PETERS, PHOTO-LITHOGRAPHER. WASHINGTON. D.C.

\ UNITED STATES PATENT OFFICE.

FREDERICK EGGE, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO SMITH 85 EGGEMANUFACTURING COMPANY, OF SAME PLACE.

PIANO-LOCK.

SPECIFICATION forming part of Letters Patent No. 230,866, dated August10, 1880.

Application filed November 21, 1879.

To all whom 'it may concern:

Be it known that I, FREDERICK EGGE, of Bridgeport, in the county ofFairfield and State of Connecticut, have invented certain new and usefulImprovements in Locks, (Case F5) and I do hereby declare that thefollowing is a full and exact description thereof, reference being hadto the accompanying drawings, making a part ot' this specitication.

My invention relates to that class ot locks which are designed foruseupon pianos and organs; and it has for its object to provide aneconomical and practical means of avoiding` the usual rattling whichoccurs in the locks I5 now used; and with these ends in view myinvention consists ot' a piano-lock having, combined with the usual boltand spring-bolt-operating device, an independent anti-rattler formed inone of the cheeks ot' the lock-case, 2o at its upper edge, said tonguebeing formed by cutting away a portion of the metal, as will behereinafter set forth.

In the drawings, Figure l is a plan view of a lock embodying myinvention; Fig. 2, a section at the line x of Fig. 1; Fig. 3, a planview with the cheek-plate removed, exposing the interior ofthe lock, thedotted lilies illustratin g the movement of the bolt.

Similar letters denote like parts in the sev- 3o eral gures.

A represents the cheek-plates, secured to the frame in the usual mannerand inclosing the bolt and bolt-operating mechanism.

B is a tongue formed in-the extreme upper edge of one of thecheek-plates by cutting away the metal in the manner shown and turningthe end in slightly to form a spring.

D is a stump extending from the key cylinder or hub E, and soconstructed and arranged with reference to the bolt and a spriiig, F,that 4o in its sweep the bolt C will be extended and moved laterally inthe position shown in dotted lines at Fig. 3.

The tongue B, being arranged and located, as shown, near the upper edgeot the cheekplate A, serres as a spring to hold the bolt in contact withthe side of the bolt-opening in the face-plate ot' the lock, and at thesame time permits its double motion.

The spring F holds the key-hub and stump 5o D in contact with the boltC, and prevents rattling at such points ot' contact.

I am aware that it 1s not new, broadly, to forni a springtongue in thecasing otl sliding bolts.

I am also aware that it is not new to provide lock-cases withindependent spring devices at other points ot' the bolt for variouspurposes, and do not wish to be understood as laying claim thereto; but

What I do claim as new, and desire to secure by Letters Patent, is-

In a piano-lock, the combination, with the bolt C and bolt-operatingmechanism, consisting of the hub E, stump D, and spring F, ot' 6; thecheek-plate cut away at its extreme upper edge, forming a tongue, B,which, while it will permit a forward and sidewise Inovement ot' thebolt, shall protect its forward end against rattling, substantially asset forth.

Witness my hand and seal this 17th day of November, A. D. 1879.

FREDERICK EGGE.

In presence of- SAML. RooKwELL, F. W. SMITH.

